The PetSafe® Rechargeable In-Ground Fence Add-A-Dog® Receiver Collar is a lightweight, waterproof receiver collar. The collar has 4 levels of static stimulation and tone-only mode to customise to your pet’s personality. Works with PetSafe® In-Ground Fence systems except YardMax® and UltraSmart® systems. This collar is compatible with the following PetSafe In-Ground Fence systems: PIG00-14673, PIG00-13661, PIG00-10777, PIG20-11041, PCF-1000-20 and PIG00-14582. Not compatible with PetSafe Wireless, PetSafe UltraSmart®, PetSafe YardMax ® or Innotek® systems. Your pet deserves the best. Trust PetSafe® to help keep your pet healthy, safe and happy.